1223331138 has 12 divisors (see below), whose sum is σ = 2650550838. Its totient is φ = 407777040.

The previous prime is 1223331133. The next prime is 1223331139. The reversal of 1223331138 is 8311333221.

It can be written as a sum of positive squares in only one way, i.e., 1102704849 + 120626289 = 33207^2 + 10983^2 .

It is not an unprimeable number, because it can be changed into a prime (1223331133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 33981403 + ... + 33981438.

Almost surely, 2^1223331138 is an apocalyptic number.

1223331138 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1223331138 is an abundant number, since it is smaller than the sum of its proper divisors (1427219700).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1223331138 is a wasteful number, since it uses less digits than its factorization.

1223331138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67962849 (or 67962846 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 1223331138 is about 34976.1509889239. The cubic root of 1223331138 is about 1069.5013654762.

Adding to 1223331138 its reverse (8311333221), we get a palindrome (9534664359).

The spelling of 1223331138 in words is "one billion, two hundred twenty-three million, three hundred thirty-one thousand, one hundred thirty-eight".